Need absolute path for third librairies

I can't add manually my jar to my project in any way.

First, I made a lib folder and add on the configuration file :

{
    "java.compile.nullAnalysis.mode": "disabled",
    "java.project.referencedLibraries": [
        "lib/**/*.jar"
    ]
}

Didn't works, the jar is not referenced.

I tried to add it with the project setting pane, get an error :

!ENTRY org.eclipse.jdt.ls.core 4 2 2026-02-12 07:53:10.315
!MESSAGE Problems occurred when invoking code from plug-in: "org.eclipse.jdt.ls.core".
!STACK 0
org.eclipse.jdt.internal.core.ClasspathEntry$AssertionFailedException: Path for IClasspathEntry must be absolute: lib/HyUI-0.8.4-all.jar
	at org.eclipse.jdt.core.JavaCore.newLibraryEntry(JavaCore.java:5430)
	at org.eclipse.jdt.ls.core.internal.commands.ProjectCommand.convertClasspathEntry(ProjectCommand.java:351)
	at org.eclipse.jdt.ls.core.internal.commands.ProjectCommand.updateClasspaths(ProjectCommand.java:244)
	at org.eclipse.jdt.ls.core.internal.JDTDelegateCommandHandler.executeCommand(JDTDelegateCommandHandler.java:104)
	at org.eclipse.jdt.ls.core.internal.handlers.WorkspaceExecuteCommandHandler$1.run(WorkspaceExecuteCommandHandler.java:230)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:47)
	at org.eclipse.jdt.ls.core.internal.handlers.WorkspaceExecuteCommandHandler.executeCommand(WorkspaceExecuteCommandHandler.java:220)
	at org.eclipse.jdt.ls.core.internal.handlers.JDTLanguageServer.lambda$4(JDTLanguageServer.java:618)
	at org.eclipse.jdt.ls.core.internal.BaseJDTLanguageServer.lambda$0(BaseJDTLanguageServer.java:87)
	at java.base/java.util.concurrent.CompletableFuture$UniApply.tryFire(Unknown Source)
	at java.base/java.util.concurrent.CompletableFuture$Completion.exec(Unknown Source)
	at java.base/java.util.concurrent.ForkJoinTask.doExec(Unknown Source)
	at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(Unknown Source)
	at java.base/java.util.concurrent.ForkJoinPool.scan(Unknown Source)
	at java.base/java.util.concurrent.ForkJoinPool.runWorker(Unknown Source)
	at java.base/java.util.concurrent.ForkJoinWorkerThread.run(Unknown Source)

!ENTRY org.eclipse.jdt.ls.core 4 0 2026-02-12 07:53:10.317
!MESSAGE Error in calling delegate command handler
!STACK 0
org.eclipse.jdt.internal.core.ClasspathEntry$AssertionFailedException: Path for IClasspathEntry must be absolute: lib/HyUI-0.8.4-all.jar
	at org.eclipse.jdt.core.JavaCore.newLibraryEntry(JavaCore.java:5430)
	at org.eclipse.jdt.ls.core.internal.commands.ProjectCommand.convertClasspathEntry(ProjectCommand.java:351)
	at org.eclipse.jdt.ls.core.internal.commands.ProjectCommand.updateClasspaths(ProjectCommand.java:244)
	at org.eclipse.jdt.ls.core.internal.JDTDelegateCommandHandler.executeCommand(JDTDelegateCommandHandler.java:104)
	at org.eclipse.jdt.ls.core.internal.handlers.WorkspaceExecuteCommandHandler$1.run(WorkspaceExecuteCommandHandler.java:230)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:47)
	at org.eclipse.jdt.ls.core.internal.handlers.WorkspaceExecuteCommandHandler.executeCommand(WorkspaceExecuteCommandHandler.java:220)
	at org.eclipse.jdt.ls.core.internal.handlers.JDTLanguageServer.lambda$4(JDTLanguageServer.java:618)
	at org.eclipse.jdt.ls.core.internal.BaseJDTLanguageServer.lambda$0(BaseJDTLanguageServer.java:87)
	at java.base/java.util.concurrent.CompletableFuture$UniApply.tryFire(Unknown Source)
	at java.base/java.util.concurrent.CompletableFuture$Completion.exec(Unknown Source)
	at java.base/java.util.concurrent.ForkJoinTask.doExec(Unknown Source)
	at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(Unknown Source)
	at java.base/java.util.concurrent.ForkJoinPool.scan(Unknown Source)
	at java.base/java.util.concurrent.ForkJoinPool.runWorker(Unknown Source)
	at java.base/java.util.concurrent.ForkJoinWorkerThread.run(Unknown Source)

The only solution/workaround I found, it's to put the jar outside of my project and use the project setting pane.

java.project.referencedLibraries のプロジェクトローカルな lib/**/*.jar エントリで失敗を再現し、次に 351 行目の ProjectCommand.java で報告されたパス変換を追跡します。プロジェクト設定ペインがどのように classpath を提供しているかを確認し、相対パスが拒否される境界を特定します。プロジェクト内の jar が受け入れられ、絶対パス例外なしで参照されれば完了です。